From ae60ceca92b802fc980a883cb280d1c57b7932cf Mon Sep 17 00:00:00 2001 From: pwpiwi Date: Tue, 1 Oct 2019 21:03:18 +0200 Subject: [PATCH 1/1] fix 'hf iclass sim' * add simulation of multiple pages (PAGESEL by @sherhannn9) * maintain cipher states per page * update cipher state after UPDATE commands (@sherhannn9) * add simulation of personalization mode * respond with SOF on HALT * display "" instead of "0f" in 'hf list iclass' * standard LED handling --- armsrc/iclass.c | 178 ++++++++++++++++++++++++++++----------------- client/cmdhflist.c | 39 +++++----- 2 files changed, 132 insertions(+), 85 deletions(-) diff --git a/armsrc/iclass.c b/armsrc/iclass.c index 0b77a039..d8f68c78 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -758,15 +758,8 @@ void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) { // Encode SOF only static void CodeIClassTagSOF() { - //So far a dummy implementation, not used - //int lastProxToAirDuration =0; - ToSendReset(); - // Send SOF ToSend[++ToSendMax] = 0x1D; -// lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning - - // Convert from last byte pos to length ToSendMax++; } @@ -783,16 +776,20 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { // free eventually allocated BigBuf memory BigBuf_free_keep_EM(); - State cipher_state_KC; - State cipher_state_KD; + uint16_t page_size = 32 * 8; + uint8_t current_page = 0; + // maintain cipher states for both credit and debit key for each page + State cipher_state_KC[8]; + State cipher_state_KD[8]; + State *cipher_state = &cipher_state_KD[0]; + uint8_t *emulator = BigBuf_get_EM_addr(); uint8_t *csn = emulator; - uint8_t sof_data[] = { 0x0F } ; // CSN followed by two CRC bytes - uint8_t anticoll_data[10] = { 0 }; - uint8_t csn_data[10] = { 0 }; + uint8_t anticoll_data[10]; + uint8_t csn_data[10]; memcpy(csn_data, csn, sizeof(csn_data)); Dbprintf("Simulating CSN %02x%02x%02x%02x%02x%02x%02x%02x", csn[0], csn[1], csn[2], csn[3], csn[4], csn[5], csn[6], csn[7]); @@ -803,26 +800,56 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { AppendCrc(anticoll_data, 8); AppendCrc(csn_data, 8); - uint8_t diversified_key_d[8] = { 0 }; - uint8_t diversified_key_c[8] = { 0 }; + uint8_t diversified_key_d[8]; + uint8_t diversified_key_c[8]; + uint8_t *diversified_key = diversified_key_d; + + // configuration block + uint8_t conf_block[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00}; + AppendCrc(conf_block, 8); + // e-Purse uint8_t card_challenge_data[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; - //uint8_t card_challenge_data[8] = { 0 }; + if (simulationMode == ICLASS_SIM_MODE_FULL) { - // Get the diversified keys from emulator memory - memcpy(diversified_key_d, emulator + (8 * 3), 8); - memcpy(diversified_key_c, emulator + (8 * 4), 8); - // Card challenge, a.k.a e-purse is on block 2 - memcpy(card_challenge_data, emulator + (8 * 2), 8); - // Precalculate the cipher states, feeding it the CC - cipher_state_KD = opt_doTagMAC_1(card_challenge_data, diversified_key_d); - cipher_state_KC = opt_doTagMAC_1(card_challenge_data, diversified_key_c); + // initialize from page 0 + memcpy(conf_block, emulator + 8 * 1, 8); + memcpy(card_challenge_data, emulator + 8 * 2, 8); // e-purse + memcpy(diversified_key_d, emulator + 8 * 3, 8); // Kd + memcpy(diversified_key_c, emulator + 8 * 4, 8); // Kc } + // save card challenge for sim2,4 attack if (reader_mac_buf != NULL) { memcpy(reader_mac_buf, card_challenge_data, 8); } + if (conf_block[5] & 0x80) { + page_size = 256 * 8; + } + + // From PicoPass DS: + // When the page is in personalization mode this bit is equal to 1. + // Once the application issuer has personalized and coded its dedicated areas, this bit must be set to 0: + // the page is then "in application mode". + bool personalization_mode = conf_block[7] & 0x80; + + // chip memory may be divided in 8 pages + uint8_t max_page = conf_block[4] & 0x10 ? 0 : 7; + + // Precalculate the cipher states, feeding it the CC + cipher_state_KD[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); + cipher_state_KC[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); + if (simulationMode == ICLASS_SIM_MODE_FULL) { + for (int i = 1; i < max_page; i++) { + uint8_t *epurse = emulator + i*page_size + 8*2; + uint8_t *Kd = emulator + i*page_size + 8*3; + uint8_t *Kc = emulator + i*page_size + 8*4; + cipher_state_KD[i] = opt_doTagMAC_1(epurse, Kd); + cipher_state_KC[i] = opt_doTagMAC_1(epurse, Kc); + } + } + int exitLoop = 0; // Reader 0a // Tag 0f @@ -837,7 +864,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { int trace_data_size = 0; // Respond SOF -- takes 1 bytes - uint8_t *resp_sof = BigBuf_malloc(2); + uint8_t *resp_sof = BigBuf_malloc(1); int resp_sof_Len; // Anticollision CSN (rotated CSN) @@ -853,8 +880,6 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { // configuration (block 1) picopass 2ks uint8_t *resp_conf = BigBuf_malloc(22); int resp_conf_len; - uint8_t conf_data[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00}; - AppendCrc(conf_data, 8); // e-Purse (block 2) // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit) @@ -877,7 +902,6 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { int len; // Prepare card messages - ToSendMax = 0; // First card answer: SOF only CodeIClassTagSOF(); @@ -895,7 +919,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { resp_csn_len = ToSendMax; // Configuration (block 1) - CodeIso15693AsTag(conf_data, sizeof(conf_data)); + CodeIso15693AsTag(conf_block, sizeof(conf_block)); memcpy(resp_conf, ToSend, ToSendMax); resp_conf_len = ToSendMax; @@ -918,16 +942,11 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { uint8_t *data_generic_trace = BigBuf_malloc(32 + 2); // 32 bytes data + 2byte CRC is max tag answer uint8_t *data_response = BigBuf_malloc( (32 + 2) * 2 + 2); - LED_A_ON(); bool buttonPressed = false; enum { IDLE, ACTIVATED, SELECTED, HALTED } chip_state = IDLE; while (!exitLoop) { WDT_HIT(); - LED_B_OFF(); - //Signal tracer - // Can be used to get a trigger for an oscilloscope.. - LED_C_OFF(); uint32_t reader_eof_time = 0; len = GetIso15693CommandFromReader(receivedCmd, MAX_FRAME_SIZE, &reader_eof_time); @@ -936,9 +955,6 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { break; } - //Signal tracer - LED_C_ON(); - // Now look at the reader command and provide appropriate responses // default is no response: modulated_response = NULL; @@ -951,8 +967,6 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { if (chip_state != HALTED) { modulated_response = resp_sof; modulated_response_size = resp_sof_Len; - trace_data = sof_data; - trace_data_size = sizeof(sof_data); chip_state = ACTIVATED; } @@ -1004,8 +1018,8 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { case 1: // configuration (block 01) modulated_response = resp_conf; modulated_response_size = resp_conf_len; - trace_data = conf_data; - trace_data_size = sizeof(conf_data); + trace_data = conf_block; + trace_data_size = sizeof(conf_block); break; case 2: // e-purse (block 02) modulated_response = resp_cc; @@ -1039,7 +1053,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { trace_data = ff_data; trace_data_size = sizeof(ff_data); } else { // use data from emulator memory - memcpy(data_generic_trace, emulator + 8*blockNo, 8); + memcpy(data_generic_trace, emulator + current_page*page_size + 8*blockNo, 8); AppendCrc(data_generic_trace, 8); trace_data = data_generic_trace; trace_data_size = 10; @@ -1055,11 +1069,17 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { || receivedCmd[0] == ICLASS_CMD_READCHECK_KC) && receivedCmd[1] == 0x02 && len == 2) { // Read e-purse (88 02 || 18 02) if (chip_state == SELECTED) { + if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD){ + cipher_state = &cipher_state_KD[current_page]; + diversified_key = diversified_key_d; + } else { + cipher_state = &cipher_state_KC[current_page]; + diversified_key = diversified_key_c; + } modulated_response = resp_cc; modulated_response_size = resp_cc_len; trace_data = card_challenge_data; trace_data_size = sizeof(card_challenge_data); - LED_B_ON(); } } else if ((receivedCmd[0] == ICLASS_CMD_CHECK_KC @@ -1068,11 +1088,7 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { if (chip_state == SELECTED) { if (simulationMode == ICLASS_SIM_MODE_FULL) { //NR, from reader, is in receivedCmd+1 - if (receivedCmd[0] == ICLASS_CMD_CHECK_KC) { - opt_doTagMAC_2(cipher_state_KC, receivedCmd+1, data_generic_trace, diversified_key_c); - } else { - opt_doTagMAC_2(cipher_state_KD, receivedCmd+1, data_generic_trace, diversified_key_d); - } + opt_doTagMAC_2(*cipher_state, receivedCmd+1, data_generic_trace, diversified_key); trace_data = data_generic_trace; trace_data_size = 4; CodeIso15693AsTag(trace_data, trace_data_size); @@ -1095,13 +1111,16 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) { if (chip_state == SELECTED) { // Reader ends the session + modulated_response = resp_sof; + modulated_response_size = resp_sof_Len; chip_state = HALTED; } } else if (simulationMode == ICLASS_SIM_MODE_FULL && receivedCmd[0] == ICLASS_CMD_READ4 && len == 4) { // 0x06 //Read 4 blocks if (chip_state == SELECTED) { - memcpy(data_generic_trace, emulator + receivedCmd[1]*8, 8 * 4); + uint8_t blockNo = receivedCmd[1]; + memcpy(data_generic_trace, emulator + current_page*page_size + blockNo*8, 8 * 4); AppendCrc(data_generic_trace, 8 * 4); trace_data = data_generic_trace; trace_data_size = 8 * 4 + 2; @@ -1121,29 +1140,37 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data)); memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax; - cipher_state_KD = opt_doTagMAC_1(card_challenge_data, diversified_key_d); - cipher_state_KC = opt_doTagMAC_1(card_challenge_data, diversified_key_c); + cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); + cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); if (simulationMode == ICLASS_SIM_MODE_FULL) { - memcpy(emulator + 8*2, card_challenge_data, 8); + memcpy(emulator + current_page*page_size + 8*2, card_challenge_data, 8); } } else if (blockNo == 3) { // update Kd - for (int i = 0; i < 8; i++){ - diversified_key_d[i] = diversified_key_d[i] ^ receivedCmd[2 + i]; + for (int i = 0; i < 8; i++) { + if (personalization_mode) { + diversified_key_d[i] = receivedCmd[2 + i]; + } else { + diversified_key_d[i] ^= receivedCmd[2 + i]; + } } - cipher_state_KD = opt_doTagMAC_1(card_challenge_data, diversified_key_d); + cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); if (simulationMode == ICLASS_SIM_MODE_FULL) { - memcpy(emulator + 8*3, diversified_key_d, 8); + memcpy(emulator + current_page*page_size + 8*3, diversified_key_d, 8); } } else if (blockNo == 4) { // update Kc - for(int i = 0; i < 8; i++){ - diversified_key_c[i] = diversified_key_c[i] ^ receivedCmd[2 + i]; + for (int i = 0; i < 8; i++) { + if (personalization_mode) { + diversified_key_c[i] = receivedCmd[2 + i]; + } else { + diversified_key_c[i] ^= receivedCmd[2 + i]; + } } - cipher_state_KC = opt_doTagMAC_1(card_challenge_data, diversified_key_c); + cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); if (simulationMode == ICLASS_SIM_MODE_FULL) { - memcpy(emulator + 8*4, diversified_key_c, 8); + memcpy(emulator + current_page*page_size + 8*4, diversified_key_c, 8); } } else if (simulationMode == ICLASS_SIM_MODE_FULL) { // update any other data block - memcpy(emulator + 8*blockNo, receivedCmd+2, 8); + memcpy(emulator + current_page*page_size + 8*blockNo, receivedCmd+2, 8); } memcpy(data_generic_trace, receivedCmd + 2, 8); AppendCrc(data_generic_trace, 8); @@ -1157,11 +1184,24 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL && len == 4) { // Pagesel + // Chips with a single page will not answer to this command + // Otherwise, we should answer 8bytes (block) + 2bytes CRC if (chip_state == SELECTED) { - // Pagesel enables to select a page in the selected chip memory and return its configuration block - // Chips with a single page will not answer to this command - // It appears we're fine ignoring this. - // Otherwise, we should answer 8bytes (block) + 2bytes CRC + if (simulationMode == ICLASS_SIM_MODE_FULL && max_page > 0) { + current_page = receivedCmd[1]; + memcpy(data_generic_trace, emulator + current_page*page_size + 8*1, 8); + memcpy(diversified_key_d, emulator + current_page*page_size + 8*3, 8); + memcpy(diversified_key_c, emulator + current_page*page_size + 8*4, 8); + cipher_state = &cipher_state_KD[current_page]; + personalization_mode = data_generic_trace[7] & 0x80; + AppendCrc(data_generic_trace, 8); + trace_data = data_generic_trace; + trace_data_size = 10; + CodeIso15693AsTag(trace_data, trace_data_size); + memcpy(data_response, ToSend, ToSendMax); + modulated_response = data_response; + modulated_response_size = ToSendMax; + } } } else if (receivedCmd[0] == 0x26 && len == 5) { @@ -1189,10 +1229,6 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { } - LED_A_OFF(); - LED_B_OFF(); - LED_C_OFF(); - if (buttonPressed) { DbpString("Button pressed"); @@ -1213,6 +1249,9 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { * @param datain */ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) { + + LED_A_ON(); + uint32_t simType = arg0; uint32_t numberOfCSNS = arg1; @@ -1220,6 +1259,7 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain FpgaDownloadAndGo(FPGA_BITSTREAM_HF); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION); + LED_D_OFF(); FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR); StartCountSspClk(); @@ -1270,8 +1310,10 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain // That will speed things up a little, but not required just yet. Dbprintf("The mode is not implemented, reserved for future use"); } + Dbprintf("Done..."); + LED_A_OFF(); } diff --git a/client/cmdhflist.c b/client/cmdhflist.c index 1b8e0955..07a286cc 100644 --- a/client/cmdhflist.c +++ b/client/cmdhflist.c @@ -225,17 +225,18 @@ void annotateIclass(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize) { } break; } - case ICLASS_CMD_SELECT: snprintf(exp,size, "SELECT"); break; - case ICLASS_CMD_PAGESEL: snprintf(exp,size, "PAGESEL(%d)", cmd[1]); break; - case ICLASS_CMD_READCHECK_KC:snprintf(exp,size, "READCHECK[Kc](%d)", cmd[1]); break; - case ICLASS_CMD_READCHECK_KD:snprintf(exp,size, "READCHECK[Kd](%d)", cmd[1]); break; - case ICLASS_CMD_CHECK: snprintf(exp,size, "CHECK"); break; - case ICLASS_CMD_DETECT: snprintf(exp,size, "DETECT"); break; - case ICLASS_CMD_HALT: snprintf(exp,size, "HALT"); break; - case ICLASS_CMD_UPDATE: snprintf(exp,size, "UPDATE(%d)",cmd[1]); break; - case ICLASS_CMD_ACT: snprintf(exp,size, "ACT"); break; - case ICLASS_CMD_READ4: snprintf(exp,size, "READ4(%d)",cmd[1]); break; - default: snprintf(exp,size, "?"); break; + case ICLASS_CMD_SELECT: snprintf(exp,size, "SELECT"); break; + case ICLASS_CMD_PAGESEL: snprintf(exp,size, "PAGESEL(%d)", cmd[1]); break; + case ICLASS_CMD_READCHECK_KC: snprintf(exp,size, "READCHECK[Kc](%d)", cmd[1]); break; + case ICLASS_CMD_READCHECK_KD: snprintf(exp,size, "READCHECK[Kd](%d)", cmd[1]); break; + case ICLASS_CMD_CHECK_KC: + case ICLASS_CMD_CHECK_KD: snprintf(exp,size, "CHECK"); break; + case ICLASS_CMD_DETECT: snprintf(exp,size, "DETECT"); break; + case ICLASS_CMD_HALT: snprintf(exp,size, "HALT"); break; + case ICLASS_CMD_UPDATE: snprintf(exp,size, "UPDATE(%d)",cmd[1]); break; + case ICLASS_CMD_ACT: snprintf(exp,size, "ACT"); break; + case ICLASS_CMD_READ4: snprintf(exp,size, "READ4(%d)",cmd[1]); break; + default: snprintf(exp,size, "?"); break; } return; } @@ -336,7 +337,7 @@ void annotateIso14443_4(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize){ else { int pos = 1; switch (cmd[0] & 0x0c) { - case 0x08: // CID following + case 0x08: // CID following case 0x04: // NAD following pos = 2; break; @@ -906,7 +907,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui timestamp *= 32; duration *= 32; } - + //Check the CRC status uint8_t crcStatus = 2; @@ -969,11 +970,15 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui if (protocol == ISO_14443A || protocol == PROTO_MIFARE) { if (duration < 128 * (9 * data_len)) { line[(data_len-1)/16][((data_len-1)%16) * 4 + 3] = '\''; - } + } } - + if (data_len == 0) { - sprintf(line[0]," "); + if (protocol == ICLASS && duration == 2048) { + sprintf(line[0], " "); + } else { + sprintf(line[0], " "); + } } //--- Draw the CRC column @@ -1014,7 +1019,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui (j == num_lines-1) ? explanation : ""); } } - + if (DecodeMifareData(frame, data_len, parityBytes, isResponse, mfData, &mfDataLen)) { memset(explanation, 0x00, sizeof(explanation)); if (!isResponse) { -- 2.39.2